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Unrated severityNVD Advisory· Published May 22, 2024· Updated Dec 18, 2025

scsi: core: Put LLD module refcnt after SCSI device is released

CVE-2021-47480

Description

In the Linux kernel, the following vulnerability has been resolved:

scsi: core: Put LLD module refcnt after SCSI device is released

SCSI host release is triggered when SCSI device is freed. We have to make sure that the low-level device driver module won't be unloaded before SCSI host instance is released because shost->hostt is required in the release handler.

Make sure to put LLD module refcnt after SCSI device is released.

Fixes a kernel panic of 'BUG: unable to handle page fault for address' reported by Changhui and Yi.

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Affected products

166

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Vulnerability mechanics

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